Grader blade



I Feb. 9, 1943. A. B. CLINKSCALES, JR 0,396

GRADER BLADE Filed April 10, 1942 2 Sheets-Sheet l Invenior Feb. 9, 1943.

A. B. CLINKSCALES, JR

GRADER BLADE 2 Sheets-Sheet 2 Filed April 10, 1942 Inventor @Qi oPatented Feb. 9, 1943 UNITED STATES PATENT OFFICE GRADER BLADE Austin13. Clinkscales, Jr., Greenville, Miss.

Application April 10, 1942, Serial No. 438,483

2 Claims.

The present invention relates to new and useful improvements in graderblades for use particularly in road or highway maintenance, and has forits primary object to provide, in a manner as hereinafter set forth, adevice of this character comprising a novel construction and arrangementwhereby the blades may be expeditiously and accurately adjusted on themoldboard as may be necessary to compensate for wear as it occurs, thusmaterially prolonging the life of said blades in addition to maintainingthe efliciency thereof.

Other objects of the invention are to provide a grader blade of theaforementioned character which will be comparatively simple inconstruction, strong, durable, light in Weight and which may bemanufactured at low cost.

All of the foregoing and still further objects and advantages of theinvention will become apparent from a study of the followingspecification, taken in connection with the accompanying drawingswherein like characters of reference designate corresponding partsthroughout the several views, and wherein:

Figure 1' is a view in front elevation of a grader blade constructed inaccordance with the present invention.

Figure 2 is a view in rear elevation thereof.

Figure 3 is a cross-sectional view.

Figure 4 is a cross-sectional view, illustrating one means of adjustablysecuring the .blades on the attaching plate.

Figure 5 is a perspective view of an intermediate portion of theattaching plate.

Figure 6 is a perspective View of a portion of one' of the blades.

Referring now to the drawings in detail, it will be seen that theembodiment of the invention which has been illustrated comprises amoldboard I of arcuate cross-section. The moldboard I is adapted to bemounted on the machine through the medium of suitable supports 2. Asillustrated to advantage in Figure 3 of the drawings, the moldboard Iincludes a rearwardly 01T- set, apertured lower marginal portion 3.

A metallic plat 4 of arcuate cross-section has its upper marginalportion firmly secured in the offset portion 3 of the moldboard I bybolts 5. Braces 6 are mounted on the back of the rearwardly ofisetportion 3 of the moldboard I. Certain of the bolts 5 are comparativelylong for securing the braces 6 in position. The braces 6 includeangularly extending end portions 1 which are engaged with the back ofthe moldboard I and the plate 4.

The plate 4 depends from the moldboard I and has formed in its lowerportion vertical slots 8. Blades 9, also of arcuate cross-section, areadjustably and removablymounted on the front ofthe plate 4 by meansincluding countersunk bolts 9' which pass through the slots 8. Retainingnuts iii are threaded on the bolts 9', washers II being provided betweensaid nuts and the plate 4. The plate 4 is further provided with verticalseries of staggered openings I2. Countersunk bolts I3 in the blades 9are insertible selectively in the staggered openings I2 for positivelysecuring said blades in adjusted position on the plate 4. Openings I4 inthe upper marginal portion of the plate 4 are aligned with the aperturesin the portion 3 of the moldboard I for the passage of the bolts 5.

It will thus be seen that the blades 9 are removably and 'adjustably butfirmly secured in position for operation on the moldboard I. Of course,to raise or lower the blades 9 on the plate 4, the bolts I3 must bewithdrawn from the openings I2. The bolts 9' may then be adjusted in theslots 8 by loosening the nuts III. The bolts I3 materially strengthenthe connection between the blades 9 and the plate 4 when considerablewear has occurred on said blades and the bolts 9' are in the lowerportions of the slots 8. The construction and arrangement is such thatthe blades 9 may be expeditiously interchanged on the plate 4.

It is believed that the many advantages of a although a preferredembodiment of the device is as illustrated and described, it is to beunderstood that changes in the details of construction and in thecombination and arrangement of parts may be resorted to which will fallwithin the scope of the invention as claimed.

What is claimed is: 3

1. A grader blade of the character described comprising a moldboardincluding a rearwardly offset lower marginal portion, a plate secured insaid offset portion of the moldboard and depending therefrom, the lowerportion of said plate having vertical slots therein and further havingstaggered vertical series of openings therein, blades mounted on theplate and depending therefrom, securing bolts on the blades operable inthe slots, additional bolts on the blades engageable selectively in theopenings, and retaining nuts threaded on the bolts and engaged with theplate, said bolts constituting means for adjustably and removablysecuring the blades in position on the plate.

2. A grader blade of the character described comprising a moldboard ofarcuate cross-section, said moldboard including a rearwardly ofisetlower marginal portion, a plate, also of arcuate cross-section, mountedon said offset portion of the moldboard and depending therefrom, bladesof arcuate cross-section removably and adjustably mounted on said plate,braces mounted on the back of said offset portion of the moldboard, andbolts securing the plate to said ofiset portion of the moldboard,certain of said bolts also securing the braces in position, said bracesincluding angularly extending end portions engaged with the back of themoldboard and with the depending portion of the plate.

AUSTIN B. CLINKSCALES, JR.

